Campbell, Neil et al. published their research in Journal of the Chemical Society in 1952 | CAS: 859299-66-4

Dimethyl 4,5-dibromophthalate (cas: 859299-66-4) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Synthetic Route of C10H8Br2O4

4,8,9-Tribromofluoranthene was written by Campbell, Neil;Leadill, W. K.;Wilshire, J. F. K.. And the article was included in Journal of the Chemical Society in 1952.Synthetic Route of C10H8Br2O4 This article mentions the following:

The tribromofluoranthene obtained by bromination of fluoranthene is the 4,8,9-isomer (C.A. numbering). Thus to 10 g. 4,9-dibromofluoranthene, 6.8 g. AcBr, and 50 mL. CS2 stirred at 0° was added 11.0 g. AlCl3, the mixture poured after 72 h. at room temperature into cold concentrated HCl, and the CS2 removed on a steam bath, yielding 10 g. crude product, m. 130-45°. Chromatog. separation gave 8-acetyl-4,9-dibromofluoranthene (I), yellow prisms, m. 159-62°. I added to a solution prepared from Br and 3N NaOH at 0°, the mixture stirred 22 h. at 60°, filtered, and the residue washed, dried, and boiled with C6H6, then with concentrated HCl, yielded 4,9-dibromo-8-fluoranthenecarboxylic acid (II), m. 306-8°; Me ester, m. 190-1°. II boiled with 10% alc. KOH and Ni-Al alloy yielded 8-fluoranthene carboxylic acid, m. 284-7°; Me ester m. 93-4°. I with NaN3 gave 8-acetamido-4,9-dibromofluoranthene, m. 284-8°; addition of HBr gave 8-amino-4,9-dibromofluoranthene-HBr, m. 245-6°, which with aqueous NH3 yielded the amine (III), m. 256-8°. III boiled with AcOH, cooled, poured into NaNO2 in H2SO4, and the solution added to CuBr solution in HBr yielded 4,8,9-tribromofluoranthene (IV), m. 208-10.5°. Oxidation of IV with Na2Cr2O7 under various conditions gave 4,5,1,2-Br2C6H2(CO2H)2, m. 200-1° (di-Me ester, m. 78-9°); 6,7-dibromo-, m. 277-9°, and 2,6,7-tribromo-9-oxo-1-fluorenecarboxylic acid, m. 317-20°. In the experiment, the researchers used many compounds, for example, Dimethyl 4,5-dibromophthalate (cas: 859299-66-4Synthetic Route of C10H8Br2O4).

Dimethyl 4,5-dibromophthalate (cas: 859299-66-4) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Synthetic Route of C10H8Br2O4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary